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Secondary battery

a second battery and battery technology, applied in the field of secondary batteries, can solve the problems of reducing size, energy density, and insufficient effect, and achieve the effects of reducing size and weight, resisting components, and high heat dissipation

Pending Publication Date: 2021-12-02
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a battery cell structure that improves heat dissipation without reducing energy density or hindering size reduction. The electrode layer has sufficient heat transfer properties. The design has a continuous surface area across the cell structure, which increases heat dissipation efficiency. This design also minimizes the contact area between the collector and the conductive base member, reducing heat accumulation and improving stability.

Problems solved by technology

For this reason, as long as heat dissipation of the collection tab of the collector is not enhanced, even in the structure for reducing accumulated heat in the electrode layer of the battery cell as in Japanese Unexamined Patent Application, Publication No. 2017-212111, such an effect cannot be sufficiently produced.
In a case where the size of the collection tab is increased for improving the heat dissipation of the collection tab, there are problems that an energy density is degraded and an obstacle to size reduction is caused.

Method used

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Embodiment Construction

[0028]Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0029]FIG. 1 shows a cell structure of a battery cell of a typical secondary battery. A reference numeral 1 indicates a positive electrode, a reference numeral 2 indicates a negative electrode, and a reference numeral 3 indicates a separator. The positive electrodes and the negative electrodes are stacked on each other in the order of the positive electrode and the negative electrode from above with each separator being interposed between the positive electrode and the negative electrode. A reference numeral 4 indicates a positive electrode collection member that collects power from each of the stacked positive electrodes, and a reference numeral 5 indicates a negative electrode collection member that collects power from each of the stacked negative electrodes. A reference numeral 6 indicates an exterior body formed of, e.g., a laminated film, and entirely covers the stack of t...

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Abstract

To provide a battery cell structure capable of improving heat dissipation without degradation of an energy density and an obstacle to size reduction while an electrode layer of a battery cell has sufficient heat transfer properties. The present invention relates to a cell structure including a positive / negative electrode formed in such a manner that a conductive base member having a three-dimensional structure contains an electrode active material and a collector formed continuously to the positive / negative electrode. One surface of the collector is formed continuously in a longitudinal direction of the positive / negative electrode (across a large area), and the other surface of the collector is exposed in a longitudinal direction of the cell structure (across a large area).

Description

[0001]This application is based on and claims the benefit of priority from Japanese Patent Application 2020-095591 filed on 1 Jun. 2020, the content of which is incorporated herein by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to a secondary battery such as a lithium ion battery, and particularly relates to a cell structure of a secondary battery improving heat dissipation in the secondary battery.Related Art[0003]Typically, a lithium ion battery has been widely used as a secondary battery having a high energy density. The secondary battery such as the lithium ion battery includes a cell structure having a collector made of metal foil, a positive / negative electrode configured such that a compounding agent containing an electrode active material is applied to a surface of the collector, and an electrolyte interposed between the positive and negative electrodes.[0004]For developing an effective function and ensuring durability such a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M10/653H01M10/613H01M4/64H01M10/0525H01M10/654
CPCH01M10/653H01M10/613H01M10/654H01M10/0525H01M4/64H01M4/13H01M10/6551H01M10/6553H01M50/103H01M10/0431H01M10/0562H01M10/0566Y02E60/10Y02P70/50
Inventor TANAAMI, KIYOSHIAOYAGI, SHINTAROISOGAI, YUJI
Owner HONDA MOTOR CO LTD
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